# ACFA APP vs sonnen

The clearest difference is update cadence: sonnen at fortnightly against ACFA APP's every 38 months. ACFA APP's advantage is iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ACFA APP ships an update every 38 months, sonnen fortnightly. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ACFA APP | sonnen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (20 ratings)](https://appshunter.io/ios/app/sonnen/id6444147829/reviews)** |
| Number of ratings | — | **20** |
| Positive reviews | — | 37.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 34 MB | 66 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Konzept-iX Software GmbH](https://appshunter.io/developer/979575425) | [sonnen GmbH](https://appshunter.io/developer/547979417) |

## What reviewers say

### ACFA APP

[App page](https://appshunter.io/ios/app/acfa-app/id1532706923)

**In-app purchases:** none


### sonnen

[App page](https://appshunter.io/ios/app/sonnen/id6444147829)

Manage your clean energy supply from anywhere. Monitor your solar PV system, battery, and EV charger in real-time. Gain insights into energy consumption and generation to optimize your usage and prepare for outages.

**Highlights:** Real-time energy data and insights, Monitor solar PV system performance, Track battery and EV charger status, View live energy flow and consumption, Access energy contract details, Set battery backup buffer

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ACFA APP free?

ACFA APP is free to download, with no in-app purchases.

### Is sonnen free?

sonnen is free to download, with no in-app purchases.

### Do ACFA APP or sonnen have ads?

Neither ACFA APP nor sonnen shows ads.

### Which is updated more often, ACFA APP or sonnen?

ACFA APP ships an update every 38 months, and sonnen fortnightly. Most recently, ACFA APP was updated on October 3, 2026 and sonnen on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*